l1_ls: A Matlab solver for l1-regularized least squares problems.BETA version, May 10 2008COPYRIGHT (c) 2007  Kwangmoo Koh, Seung-Jean Kim and Stephen Boyd.Permission to use, copy, modify, and distribute this software forany purpose without fee is hereby granted, provided that this entirenotice is included in all copies of any software which is or includesa copy or modification of this software and in all copies of thesupporting documentation for such software.This software is being provided "as is", without any express orimplied warranty.  In particular, the authors do not make anyrepresentation or warranty of any kind concerning the merchantabilityof this software or its fitness for any particular purpose.--------------------------------------------------------------------------------Please see the comments in the source code, for more information.--------------------------------------------------------------------------------Files of interest:SOLVERS    l1_ls.m : main solver    l1_ls_nonneg.m : main solver (with non-negativity constraints)EXAMPLES    simple_example.m : example for the basic usage    operator_example.m : example that illustrates the object                          programming feature of MatlabUTILITY    find_lambdamax_l1_ls : utility file for finding maximum value of lambda    find_lambdamax_l1_ls_nonneg : finding maximum value of lambda of                              l1-regularized LSP with nonnegativity constraints